public class Example5_1 {
   public static void main (String args[]) {
     Student zhang = new Student();
     zhang.age = 17;
     zhang.number=100101;
     zhang.showPeopleMess();
     zhang.tellNumber();
     int x=9,y=29;
     System.out.print("会做加法:");
     int result=zhang.add(x,y);
     System.out.printf("%d+%d=%d\n",x,y,result);
     UniverStudent geng = new UniverStudent();
     geng.age=21;
     geng.number =6609;
     geng.showPeopleMess();
     geng.tellNumber();
     System.out.print("会做加法:");
     result=geng.add(x,y);
     System.out.printf("%d+%d=%d\t",x,y,result);
     System.out.print("会做乘法:");
     result=geng.multi(x,y);
     System.out.printf("%d×%d=%d\n",x,y,result);
   }
}
